[charms] removal reminder

Hi All,

This is a courtesy reminder that the following charm projects were deprecated [1], received final releases with the 18.11 OpenStack Charms Release, and will be removed prior to the Stein / 19.04 OpenStack Charms releases.

[1] https://docs.openstack.org/charm-guide/latest/1811.html

charm-glusterfs (unmaintained) charm-interface-odl-controller-api (unmaintained) charm-manila-glusterfs (unmaintained) charm-murano (unmaintained) charm-neutron-api-odl (unmaintained) charm-nova-compute-proxy (unmaintained) charm-odl-controller (unmaintained) charm-openvswitch-odl (unmaintained) charm-trove (unmaintained)

Cheers,

Ryan